Shift-F3: Toggle selected text between lowercase, proper case (first letter cap) and uppercase.
F4: Repeat your last action, including searching, typing, and formatting.
Shift-F4: Repeat the most recent Find command.
Shift-F5: Jump to the last change you made in the document.
Ctrl-F6: Toggle between open documents.
Alt-mouse click: Open the Research pane with information on the word or name you clicked on.
F7: Run the spell-checker.
F12: Open the Save As dialog.